package com.google.code.mochaccino.framework.search;
/*
 * Copyright 2012 Claude Houle claude.houle@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.IOException;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;

/** Index Updater */
public final class SearchIndexUpdater {
	private IndexWriter writer;

	/** Constructor */
	SearchIndexUpdater( IndexWriter writer ) {
		this.writer = writer;
	}

	/** Terminate Index Updating and rollback all changes */
	public void abort() throws IOException {
		writer.rollback();
		writer = null;
	}

	/** Add Document to the Index */
	public void add( Document doc ) throws IOException {
		writer.addDocument( doc );
	}

	/** Terminate Index Updating and commits all changes */
	public void complete() throws IOException {
		writer.commit();
		writer = null;
	}

	/** Remove Document from the index */
	public void remove( Term id ) throws IOException {
		writer.deleteDocuments( id );
	}

	/** Update Index */
	public void update( Term id, Document doc ) throws IOException {
		writer.updateDocument( id, doc );
	}
}
